shell編程-批量創建用戶

批量創建用戶：
#!/bin/bash
#FILENAME is useradd
read -p "請輸入要創建的用戶帳號名：" user
i=1
while [ $i -le 3 ]
do

id ${user}_$i &> /dev/null
if [ $? -eq 1 ];then
useradd ${user}_$i
echo "${user}_$i" | passwd --stdin ${user}_$i &> /dev/null
ID=`id ${user}_$i`
name=${user}_$i
echo -e "${user}_$i用戶創建成功\n用戶的ID信息為:${ID}\n用戶名為$name\n密碼為:${name}"
fi
let i++
done


批量刪除用戶：
#!/bin/bash
#FILENAME is useradd
read -p "請輸入要刪除的用戶帳號名：" user
i=1
while [ $i -le 3 ]
do

id ${user}_$i &> /dev/null
if [ $? -eq 0 ];then
userdel -r ${user}_$i
name=${user}_$i
echo -e "${user}_$i用戶刪除成功"
fi
let i++
done